Fuse.



P. B; COOK.

FUSE.

APPLIUATmN FILED MAY 1o, 1911.

1,099,589. Patented June 9, 1914.

UNITED STATES PATENT OFFICE.

FRANK B. COOK, OF-CHICAGO, ILLINOIS, ASSIG'NOR TO FRANK B. COOK COMPANY,0F

CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS. v

FUSE.

Specification of Letters Patent.

Patented June 9, 1914.

To all whom it m ay concern Be -it known that I, FRANK B. CooK, acitizen of the United States, residing at Chicago, inthe county of Cookand State of Illinois, have invented certain new and useful Improvementsin Fuses, of which the following is a specification. y

The object of this invention is to provide an improved fuse forelectrical purposes.

In the accompanying drawings, Figure 1l is a side elevation of a fuseembodying the features of my invention. Figs. 2 to 5 are views, in aseries, showing the manner of v, making the'fuse. Fig. 6 is a view ofone of' the strips which constitute the end caps of the fuse.

' A fuse embodying my invention comprises an 'elongated sheet or strip11 of mica or ,othery suitable material, said sheet having notches 12 inopposite side edges thereof, the

two series of notches at the opposite edges being staggered withreference to each other. A fuse wire 13 is wrapped a suitable number oftimes around the sheet 11 and in the notches 12, said notches serving asa gage to indicate the proper amount of wire to be wound upon the sheet11, and also to space the Wire from thev edges of the sheet. After thewire .13'has been wound around the sheet 11, sheets 14 of mica or othersuitable material are placed at .opposite sides of the sheet v 11, asshown in Fig. 4, the end portions of the fuse wire 13 preferably .beingbent around the ends of the sheets 14. The end portions of the fuse wirelie upon the outer sides of the sheets 14. Strips 15 of conductingmaterial, as copper, are now folded about the opposite ends of thesheets 11 and 14,

and the whole secured together by dipping the ends in solder or othersuitable material,

as indicated at 16 in Fig. 1. The strips 15 g fiat shaperequires lessmaterial and occu-- pies less space for a given length than any othershape. The flat end-cap is cheaply attached, gives a form fitting manycommon fuse clips, and allows screw slots similar to those of manyordinary fuses to be easily punched. The sharp bend in the notchesinstantly destroys the arc which tends to form when the fuse explodes,and by winding the wire around the strip a very short fuse for a givenwire-length is obtained.

I claim as my inwention:

In a fuse, in combination, an inner flat sheet of insulating material,two outer sheets of insulating material lying at opposite sides of saidinner sheet, said inner sheet having notches in its opposite edges, thenotches in one edge being staggered with relation to those in the otheredge, a fuse wire wrapped about said inner sheet and lying in thebottoms of said notches, the end portions of said fuse wire being bentaro-und the ends of said outer insulating sheets, the end portions ofthe fuse wire lying upon the outer sides of the outer insulating sheets,strips of conducting material bent to inclose the ends of said fuse wireand contacting the latter, and solder securing each inclosing strip tothe adjacent end portion of the fuse Wire.

In testimony whereof I affix my signature in presence of two witnesses.

FRANK B. COOK.

Witnesses lJN0. F. ToMPKINs,

A, B. FARRISH.

www Copies of this patent may be obtained for ve cents each, byaddressing the Commissioner of Patents,

Washington, D. G.

